Blood Circulation: How the Heart Pumps Oxygen-Poor Blood to the Lungs
Deoxygenated blood flow path:
- Right atrium – Receives blood via superior/inferior vena cava.
- Right ventricle – Pumps blood through pulmonary artery to lungs.
- Pulmonary capillaries/alveoli – CO₂ released, O₂ absorbed (diffusion).
- Pulmonary veins – Oxygenated blood returns to left atrium.
- Left ventricle – Pumps oxygenated blood via aorta to body.
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